View source for 3F0894-04, Submits Suppl Response to GL 91-06,resolution of GI A-30 Re Adequacy of Safety Related Dc Power Supplies

{{Adams
| number = ML20071P437
| issue date = 08/04/1994
| title = Submits Suppl Response to GL 91-06,resolution of GI A-30 Re Adequacy of Safety Related Dc Power Supplies
| author name = Beard P
| author affiliation = FLORIDA POWER CORP.
| addressee name = 
| addressee affiliation = NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
| docket = 05000302
| license number = 
| contact person = 
| case reference number = REF-GTECI-A-30, REF-GTECI-EL, TASK-A-30, TASK-OR
| document report number = 3F0894-04, 3F894-4, GL-91-06, GL-91-6, NUDOCS 9408090325
| document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE
| page count = 3
}}

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i 8     000 Florida Power CORPORATION Crystal River Unit 3 Dmket No. 50-302 August 4, 1994 3F0894-04 Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC      20555

==Subject:==
Generic Letter 91-06, Resolution of Generic Issue A-30 Adequacy of Safety Related DC Power Supplies Supplemental Response

==References:==
: 1. Generic letter 91-06, 3N0491-21, dated April 29, 1991
: 2. FPC to NRC letter, 3F1091-14, dated October 25, 1991

==Dear Sir:==

In Reference 1, the NRC Staff requested design, operation, maintenance, and surveillance information concerning safety related DC systems. In Reference 2, Florida Power Corporation (FPC) provided our response to that request for Crystal River 3 (CR-3). Question 3.a.1 in Reference I requested information regarding the existence of control room alarms when battery disconnects or circuit breakers are open. In our response, FPC indicated that such alarms did not exist at CR-3, but that a modification was planned to add them.
The disconnect switches are currently independently verified to be closed following any operation. In addition, their position is verified by a weekly surveillance as required by Technical Specifications.
As part of the design process for the modification to add the alarms, a cost estimate was prepared. It indicated the cost of the modification would be in excess of $157,000.        This amount was deemed excessive, considering the incremental safety benefit to be gained. As a result, a decision was made to cancel the modification. This decision was reviewed and concurred with by the Plant Review Committee. Therefore, an automatic alarm on the disconnect switches for the station batteries will not be added as previously indicated in our response to Generic Letter 91-06.
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CHYSTAL IWER DJD10Y COMPLEX . 15700 W. Power une Ctrout . CrystrJ River . f%rida 344284700 . p04) 795640G rou corniany 9400090325 940804 PDR ADOCK 05000302 P                     PDR

h U. S. Nuclear Regulatory Commission                                                   '
3F0894-04 Page 2                                                                                :
This information is provided to assure correct information is available for           ;
resolution of Generic Issue A-30 by the NRC Staff. No specific action regarding       l Crystal River Unit 3 is requested or required.                                        l Sincerely, P. M. Beard, Jr.
Senior Vice President                                                                 !
Nuclear Operations I
Attachment PMB:AEF                                                                               .
xt: Regional Administrator, Region 11 Senior Resident Inspector NRR Project Manager i
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ATTACHMENT TO LETTER NO. 3F0894-04                                        -
STATE OF FLORIDA                                                                                    [
COUNTY OF CITRUS                                                                                    i i
P. M. Beard, Jr. states that he is the Senior Vice President, Nuclear Operations for Florida Power Corporation; that he is authorized on the part of said company                    l to sign and file with the Nuclear Regulatory Commission the information attached hereto; and that all such statements made and matters set forth therein are true and correct to the best of his knowledge, information, and belief.
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P. M. Beard, Jr.                                         ,
Senior Vice President                                    :
Nuclear Operations Subscribed County aboveand    sworn named,   this to b fge me, day     a Notary of August    Public in and for the State and 1994.
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